The reason is this case is that the Euros, like many soccer tournaments, has two stages: a group stage and a knockout stage. The knockout stage can be represented by the standard bracket, but the group stage can't - in this tournament there are four groups of four teams and each group plays a round-robin (every team plays each other.) The top two in each group at the end progress to the knockout stage. The challenge is showing both in the same diagram.
I kind of like this one. It's hard to see the "big picture" so to speak (what is each team's path forward in time to the final?) but it does nicely show the schedule. Also, what you can't see from the static image is that in the interactive version, when you mouse over any line it lights up so you can clearly see that team's progress.

Conventionally, the bracket in a sports tournament is presented like this (link): In the Euro 2012 that's happening right now, the group stage is followed by the knockout stage (quarter-, semi- and final). The knockout stage is pretty straightforward. The group stage presents some challenges b...